利用水槽实验对不同流速下三角洲发育区别的探究  

Study on difference of delta development under different flow velocities by flume experiment

作　　者：魏康强 张元福[1] 李媛 王振[1] 白一鸣[1] 张博文[1] 

机构地区：[1]中国地质大学(北京)能源学院,北京100083

出　　处：《复杂油气藏》2017年第3期6-11,共6页Complex Hydrocarbon Reservoirs

基　　金：国家重大科技专项(2011ZX05009-002)资助

摘　　要：实验借助自制的小型水槽,探究了中等流速和高流速下三角洲发育的区别,结果表明:流速对于三角洲发育的影响主要体现在时间和规模上。不同流速下的发育过程均可划分为高建设期和低建设期。中等流速下三角洲在低建设期横向发育和斜向发育交替进行,而高流速下三角洲在低建设期先横向发育再斜向发育,并且高流速下三角洲砂体发育的时间较长。对于河道和朵叶体来说,中等流速下两者的数量要比高流速下两者的数量多。同一种流速下,不同位置的河道和朵叶体的规模存在区别,一般来说,发育在正前方的河道和朵叶体规模比两侧的规模大,但数量比两侧的要少。With the aid of a small homemade tank,it was carried out study on the differences of delta development at moderate and high flow rates. The experimental results showed that the influence of flow velocity on delta development is mainly reflected in time and scale. The developmental processes under different flow rates can be divided into high and low construction periods. At medium flow velocity,the delta was alternately developed on the transverse and the acclivous direction during low construction period. However,at high flow velocity,the delta was developed transversely and then obliquely during the same period,with a longer time of delta sand body development. For the channel and the leaf body,the number at moderate flow velocity is more than that at high flow velocity. At the same flow velocity,the scale of the channels and lobes is various at different position. Generally speaking,the channels and lobes in front are larger on scale,but smaller in number.

关 键 词：水槽实验 流速 三角洲发育 分流河道 朵叶体 

分 类 号：P512.2[天文地球—地质学]